diff -up moodle/filter/tex/settings.php.mimetex moodle/filter/tex/settings.php
--- moodle/filter/tex/settings.php.mimetex	2015-05-11 16:33:46.664262429 +0200
+++ moodle/filter/tex/settings.php	2015-05-11 16:34:10.375087129 +0200
@@ -45,6 +45,7 @@ if ($ADMIN->fulltree) {
         $default_filter_tex_pathdvips   = "/usr/bin/dvips";
         $default_filter_tex_pathdvisvgm = "/usr/bin/dvisvgm";
         $default_filter_tex_pathconvert = "/usr/bin/convert";
+        $default_filter_tex_pathmimetex = "/usr/bin/mimetex";
     } else if (PHP_OS=='Darwin') {
         // most likely needs a fink install (fink.sf.net)
         $default_filter_tex_pathlatex   = "/sw/bin/latex";
diff -up moodle/filter/tex/settings.php.tex moodle/filter/tex/settings.php
--- moodle/filter/tex/settings.php.tex	2015-05-11 17:39:58.002794594 +0200
+++ moodle/filter/tex/settings.php	2015-05-11 17:40:49.834605396 +0200
@@ -78,7 +78,7 @@ if ($ADMIN->fulltree) {
     $items[] = new admin_setting_configexecutable('filter_tex/pathdvips', get_string('pathdvips', 'filter_tex'), '', $default_filter_tex_pathdvips);
     $items[] = new admin_setting_configexecutable('filter_tex/pathconvert', get_string('pathconvert', 'filter_tex'), '', $default_filter_tex_pathconvert);
     $items[] = new admin_setting_configexecutable('filter_tex/pathdvisvgm', get_string('pathdvisvgm', 'filter_tex'), '', $default_filter_tex_pathdvisvgm);
-    $items[] = new admin_setting_configexecutable('filter_tex/pathmimetex', get_string('pathmimetex', 'filter_tex'), get_string('pathmimetexdesc', 'filter_tex'), '');
+    $items[] = new admin_setting_configexecutable('filter_tex/pathmimetex', get_string('pathmimetex', 'filter_tex'), get_string('pathmimetexdesc', 'filter_tex'), $default_filter_tex_pathmimetex);
 
     // Even if we offer GIF, PNG and SVG formats here, in the update callback we check whether
     // required paths actually point to executables. If they don't, we force the setting